In Greek mythology, Astyanax (/əˈstaɪ.ənæks/; Ancient Greek: Ἀστυάναξ Astyánax, "protector of the city") was the son of Hector, Crown Prince of Troy and Princess Andromache of Cilician Thebe. His birth name was Scamandrius (in Greek Σκαμάνδριος or Σκάμανδρος, after the river Scamander), but the people of Troy nicknamed him Astyanax (i.e. high king, or overlord of the city), because he was the son of the city's great defender (Iliad VI, 403) and the heir apparent's firstborn son.
During the Trojan War, Andromache hid the child in Hector's tomb, but the child was discovered. His fate was debated by the Greeks, for if he were allowed to live, it was feared he would avenge his father and rebuild Troy. In the version given by the Little Iliad and repeated by Pausanias (x 25.4), he was killed by Neoptolemus (also called Pyrrhus), who threw the infant from the walls. Another version is given in Iliou persis, in which Odysseus kills Astyanax. It has also been depicted in some Greek vases that Neoptolemus kills Priam, who has taken refuge near a sacred altar, using Astyanax's dead body to club the old king to death, in front of horrified onlookers. In Ovid's Metamorphoses, the child is thrown from the walls by the Greek victors (13, 413ff). In Euripides's The Trojan Women (719 ff), the herald Talthybius reveals to Andromache that Odysseus has convinced the council to have the child thrown from the walls, and the child is in this way killed. In Seneca's version of The Trojan Women, the prophet Calchas declares that Astyanax must be thrown from the walls if the Greek fleet is to be allowed favorable winds (365–70), but once led to the tower, the child himself leaps off the walls (1100–3). Other sources for the story of the Sack of Troy and Astyanax's death can be found in the Bibliotheca (Pseudo-Apollodorus), Hyginus (Fabula 109), Tryphiodorus (Sack of Troy 644–6).
Astyanax is a genus of freshwater fish in the family Characidae of the order Characiformes. Some of these fish, like many of their relatives, are kept as aquarium pets and known collectively as tetras. With around 140 described species and new ones being described every few months, this genus is among the largest of the entire order; Hyphessobrycon also has more than 130 species, and which one is larger at any one time depends on whether more species have been recently described in one or the other. The blind cave fish, a form of A. mexicanus, is a famous member of this genus. A. jordani a different but closely related blind fish, was formerly considered to form its own genus, Anoptichthys.
The type species is A. mexicanus, the Mexican tetra. The generic name comes from Astyanax, a character in Greek mythology, who was the son of Hector of Troy; in homage to this, several specific epithets also refer to the Iliad.
This genus is more or less defined as in 1917 by Carl H. Eigenmann. The lack of comprehensive phylogenetic analyses dealing with this genus is hindering a thorough review, and the relationships remain as indeterminate as the monophyly is doubtful. Although included in Astyanax by FishBase, phylogenetic evidence supports moving A. aurocaudatus back to the monotypic genus Carlastyanax.
Astyanax can refer to: